CN104727317A - Composite structure for reducing anchor cable prestress loss - Google Patents
Composite structure for reducing anchor cable prestress loss Download PDFInfo
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- CN104727317A CN104727317A CN201510040651.8A CN201510040651A CN104727317A CN 104727317 A CN104727317 A CN 104727317A CN 201510040651 A CN201510040651 A CN 201510040651A CN 104727317 A CN104727317 A CN 104727317A
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- spring
- anchor cable
- channel
- section steel
- rock
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- 239000002131 composite material Substances 0.000 title 1
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 239000002689 soil Substances 0.000 claims abstract description 19
- 239000011435 rock Substances 0.000 claims description 17
- 239000002002 slurry Substances 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims description 2
- 239000011440 grout Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 230000001012 protector Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000004873 anchoring Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a combined structure for reducing the prestress loss of an anchor cable and an anchor rod, which comprises a prestressed anchor cable, a constraint spring moving structure, a spring, an end fastening device and a channel steel, wherein one part of the prestressed anchor cable extends into an anchor cable hole preset in a rock-soil body, the other part of the prestressed anchor cable is exposed out of the rock-soil body, the exposed part of the prestressed anchor cable is sleeved with the spring, the channel steel is supported and arranged at the outer side of the spring, one ends of the spring and the channel steel are tightly attached to the rock-soil body, the other end of the spring is higher than the other end of the channel steel, and the spring is limited and fixed through the constraint spring; and filling grout in the anchor cable hole, and after the grout is solidified, installing an end head fastening device at the top end of the exposed part of the prestressed anchor cable for fastening, wherein the end head fastening device applies prestress through the other end of the spring. The anchor cable pre-stress protector is simple to manufacture, low in manufacturing cost and simple and convenient to install, and can effectively reduce or even eliminate anchor cable pre-stress loss.
Description
Technical field
The present invention relates to a kind of combining structure, be applicable to prestress anchorage cable or anchor pole.
Background technology
Current prestress anchorage cable (anchor pole) technology has been widely used in industrial civil building, bridge, mine construction, high gradient slope, the surrounding rock consolidation of large underground hole, the supporting of deep big foundation pit, the reinforcing of the dam foundation, and the going along with sb. to guard him and reinforcement of various building.The maximum feature of prestressed anchorage technology be disturbance as few as possible by the soil body of anchoring or rock mass, by anchor measure, take full advantage of the self-strength of rock mass or the soil body, thus greatly reduce supporting cost, be widely used.
In prestressed anchorage technology application process, the loss of anchoring prestress is the major issue that designer and supervisor of construction are concerned about, also relates to one of engineering safety whether key problem.Loss of prestress and material property, relevant by the crudy of anchoring medium mechanical characteristic, anchor clamp, construction technology and operation and management level.In engineering, in the prestressed applying process of anchor cable (anchor pole), because the supporting back side is uneven, it is comparatively large that passive channel-section steel bears prestressing force, and deflection is larger.When giving one of them anchor cable Shi Hanzhang, channel-section steel distortion can cause the contiguous loss of prestress being applied to design prestress anchorage cable, and distance is nearer, and loss of prestress is more, thus can not ensure requirement of engineering, even causes engineering safety accident.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of combining structure reducing prestressd anchor cable loss, makes simple, cheap, simple installation, can effectively reduce and even eliminate prestressd anchor cable loss.
Technical scheme: for achieving the above object, technical scheme of the present invention is as follows:
A kind of combining structure reducing prestressd anchor cable loss, comprise prestress anchorage cable, restricted spring moving structure, spring, termination fastener and channel-section steel, a described prestress anchorage cable part stretches in the anchor cable hole preset in Rock And Soil, another part exposes Rock And Soil, the sheathed spring in described prestress anchorage cable exposed portion, described channel steel support is arranged on the outside of spring, Rock And Soil is close in one end of described spring and channel-section steel, the other end of described spring exceeds the other end of channel-section steel, and spacing fixing by the restricted spring moving structure be arranged on channel-section steel; Fill slurries in described anchor cable hole, after grout cures, in installation termination, top, prestress anchorage cable exposed portion, fastener is fastening, and described termination fastener is by the other end Shi Hanzhang of spring.
Further, after fastening by termination fastener, the other end of described spring is still higher than the other end of channel-section steel, and the compress energy storage of spring is 80 ~ 100% of prestressd anchor cable.
Further, each combining structure comprises multiple assembled unit, each assembled unit in described combining structure shares two channel-section steels, each assembled unit also comprises a spring, a prestress anchorage cable and a restricted spring moving structure, described spring housing is located on prestress anchorage cable, and it is spacing fixing by restricted spring moving structure, described two channel-section steels are fixedly installed on the top and bottom of restricted spring moving structure dorsad, and Rock And Soil is close in one end of a groove side of described channel-section steel and spring, the other end of spring exceeds another groove side of channel-section steel.
Further, described restricted spring moving structure is hollow steel tube structure, is all welded with circular hole steel plate up and down, on described steel plate, the diameter of circular hole and the interior diameter of steel pipe etc. are large, the interior diameter of steel pipe is greater than the external diameter of spring slightly, and spring is arranged in steel pipe, and prestress anchorage cable passes from spring inner.
Further, described slurries can be cement paste or resin bonded body.
Beneficial effect: the present invention bears main prestressing force owing to adopting spring structure, during normal condition, spring free length is greater than channel-section steel height, according to the position of anchor cable, the structure of restricted spring movement is fixed on channel-section steel corresponding position, when Shi Hanzhang, spring is first stressed, when camber of spring to a certain extent time channel-section steel just start stressed, the spring without rigidity and different length can be selected according to different prestressing force sizes, thus control the stressed and distortion of channel-section steel, reduce the loss of prestressd anchor cable.This combining structure can effectively reduce the loss of prestress of anchor cable, makes simple, with low cost, easy for installation, anchor cable or anchor rod prestress structure all can be suitable for.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is partial enlarged drawing of the present invention.
Accompanying drawing 3 is Facad structure schematic diagram of the present invention.
In figure: 1-prestress anchorage cable (anchor pole); 2-restricted spring moving structure; 3-spring; 4-termination fastener; 5-channel-section steel; 6-anchor cable hole; 7-slurries; 8-Rock And Soil.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, a kind of combining structure reducing prestressd anchor cable loss, comprises prestress anchorage cable 1, restricted spring moving structure 2, spring 3, termination fastener 4 and channel-section steel 5.In project implementing process, first according to the anchor cable hole 6 that design attitude is preset in Rock And Soil 8, described prestress anchorage cable 1 part stretches in the anchor cable hole 6 preset in Rock And Soil 8, another part exposes Rock And Soil 8, the sheathed spring 3 in described prestress anchorage cable 1 exposed portion, described channel-section steel 5 supports the outside being arranged on spring 3, Rock And Soil 8 is close in one end of described spring 3 and channel-section steel 5, the other end of described spring 3 exceeds the other end of channel-section steel 5, and spacing fixing by the restricted spring moving structure 2 be arranged on channel-section steel 5.
Slurries 7 are filled in described anchor cable hole 6, after slurries 7 solidify, in installation termination, top, prestress anchorage cable 1 exposed portion, fastener 4 is fastening, Shi Hanzhang, when prestress value reaches designing requirement, fixing and locking termination fastener 4, described termination fastener 4 is by the other end Shi Hanzhang of spring 3.After fastening by termination fastener 4, the other end of described spring 3 is still higher than the other end of channel-section steel 5.Because certain Free Transform amount reserved by spring 3, first the prestressing force applied born by spring 3, and when spring 3 is compressed to highly identical with channel-section steel 5, remaining prestressing force is just born by channel-section steel 5, therefore channel-section steel 5 deflection reduces greatly, and adjacent prestress anchorage cable 1 loss of prestress reduces greatly.The present invention uses the spring 3 of different-stiffness and length according to different prestressing force.
Wherein, slurries 7 can be cement paste or resin bonded body etc.
As shown in Figures 2 and 3, each combining structure comprises multiple assembled unit, each assembled unit in described combining structure shares two channel-section steels 5, each assembled unit also comprises a spring 3, a prestress anchorage cable 1 and a restricted spring moving structure 2, described spring 3 is set on prestress anchorage cable 1, and it is spacing fixing by restricted spring moving structure 2, described restricted spring moving structure 2 is hollow steel tube structure, all be welded with circular hole steel plate up and down, on described steel plate, the diameter of circular hole and the interior diameter of steel pipe etc. are large, the interior diameter of steel pipe is greater than the external diameter of spring slightly, spring 3 is arranged in steel pipe, prestress anchorage cable 1 passes from spring 3 inside.Described two channel-section steels 5 are fixedly installed on the top and bottom of restricted spring moving structure 2 dorsad, and Rock And Soil 8 is close in one end of a groove side of described channel-section steel 5 and spring 3, and the other end of spring 3 exceeds another groove side of channel-section steel 5.
During construction, the prestressing force of 80% ~ 100% anchor cable 1 is born by the spring 3 of linear variable resistance, and by the effect of the linear deformation of spring 3 and accumulation of energy in advance, avoid because the back side out-of-flatness of traditional support channel-section steel 5 causes distortion, thus cause the prestressed loss of prestress anchorage cable 1 problem totally, this combining structure has, and makes simple, cheap, easy construction, installation is rapid, the plurality of advantages such as wide application.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. one kind reduces the combining structure of prestressd anchor cable loss, it is characterized in that: comprise prestress anchorage cable (1), restricted spring moving structure (2), spring (3), termination fastener (4) and channel-section steel (5), described prestress anchorage cable (1) part stretches in the anchor cable hole (6) preset in Rock And Soil (8), another part exposes Rock And Soil (8), the sheathed spring in described prestress anchorage cable (1) exposed portion (3), described channel-section steel (5) supports the outside being arranged on spring (3), Rock And Soil (8) is close in one end of described spring (3) and channel-section steel (5), the other end of described spring (3) exceeds the other end of channel-section steel (5), and it is spacing fixing by the restricted spring moving structure (2) be arranged on channel-section steel (5),
Slurries (7) are filled in described anchor cable hole (6), after slurries (7) solidify, fastening on installation termination fastener, prestress anchorage cable (1) top, exposed portion (4), described termination fastener (4) is by the other end Shi Hanzhang of spring (3).
2. according to claim 1 a kind of reduce prestressd anchor cable loss combining structure, it is characterized in that: after fastening by termination fastener (4), the other end of described spring (3) is still higher than the other end of channel-section steel (5), and the compress energy storage of spring (3) is anchor cable (1) prestressed 80 ~ 100%.
3. according to claim 1 a kind of reduce prestressd anchor cable loss combining structure, it is characterized in that: each combining structure comprises multiple assembled unit, each assembled unit in described combining structure shares two channel-section steels (5), each assembled unit also comprises a spring (3), a prestress anchorage cable (1) and a restricted spring moving structure (2), described spring (3) is set on prestress anchorage cable (1), and it is spacing fixing by restricted spring moving structure (2), described two channel-section steels (5) are fixedly installed on the top and bottom of restricted spring moving structure (2) dorsad, and Rock And Soil (8) is close in one end of a groove side of described channel-section steel (5) and spring (3), the other end of spring (3) exceeds another groove side of channel-section steel (5).
4. according to claim 1 a kind of reduce prestressd anchor cable loss combining structure, it is characterized in that: described restricted spring moving structure (2) is hollow steel tube structure, all be welded with circular hole steel plate up and down, on described steel plate, the diameter of circular hole and the interior diameter of steel pipe etc. are large, the interior diameter of steel pipe is greater than the external diameter of spring slightly, spring (3) is arranged in steel pipe, and prestress anchorage cable (1) passes from spring (3) inside.
5. a kind of combining structure reducing prestressd anchor cable loss according to claim 1, is characterized in that: described slurries (7) can for cement paste or resin bonded body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510040651.8A CN104727317B (en) | 2015-01-27 | 2015-01-27 | A kind of combinative structure reducing prestressd anchor cable loss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510040651.8A CN104727317B (en) | 2015-01-27 | 2015-01-27 | A kind of combinative structure reducing prestressd anchor cable loss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104727317A true CN104727317A (en) | 2015-06-24 |
| CN104727317B CN104727317B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510040651.8A Expired - Fee Related CN104727317B (en) | 2015-01-27 | 2015-01-27 | A kind of combinative structure reducing prestressd anchor cable loss |
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| CN (1) | CN104727317B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759323A (en) * | 2017-01-20 | 2017-05-31 | 中铁二院工程集团有限责任公司 | Anchor pole shock-resistant and energy-dissipating is constructed |
| CN109295974A (en) * | 2018-09-27 | 2019-02-01 | 中国人民解放军军事科学院国防工程研究院 | A kind of dynamic load modular controllable displacement prestress anchorage cable head elasticity system and method |
| CN112360528A (en) * | 2020-10-27 | 2021-02-12 | 国网经济技术研究院有限公司 | Surrounding rock anchoring supporting structure with controllable anchoring force and large deformation adaptability |
| CN114547731A (en) * | 2022-01-20 | 2022-05-27 | 中国电建集团成都勘测设计研究院有限公司 | Method for determining free length of cavity side wall anchor cable containing specific structural surface and application |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08165646A (en) * | 1994-12-13 | 1996-06-25 | Makoto Koda | Fixation construction method of ground anchor using spring |
| JP2001115449A (en) * | 1999-10-19 | 2001-04-24 | Ohbayashi Corp | Anchor head part fixing structure |
| US6334281B1 (en) * | 2000-05-17 | 2002-01-01 | James Oliver | Ground anchor with downward biased compression cap |
| CN101798812A (en) * | 2010-04-19 | 2010-08-11 | 北京科技大学 | Double anchoring section prestressed anchoring system with three-layer protection and anchoring method thereof |
| CN203701613U (en) * | 2013-11-12 | 2014-07-09 | 中建三局建设工程股份有限公司 | Limiting device capable of automatically adjusting expansion and contraction quantity of clamping piece |
-
2015
- 2015-01-27 CN CN201510040651.8A patent/CN104727317B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08165646A (en) * | 1994-12-13 | 1996-06-25 | Makoto Koda | Fixation construction method of ground anchor using spring |
| JP2001115449A (en) * | 1999-10-19 | 2001-04-24 | Ohbayashi Corp | Anchor head part fixing structure |
| US6334281B1 (en) * | 2000-05-17 | 2002-01-01 | James Oliver | Ground anchor with downward biased compression cap |
| CN101798812A (en) * | 2010-04-19 | 2010-08-11 | 北京科技大学 | Double anchoring section prestressed anchoring system with three-layer protection and anchoring method thereof |
| CN203701613U (en) * | 2013-11-12 | 2014-07-09 | 中建三局建设工程股份有限公司 | Limiting device capable of automatically adjusting expansion and contraction quantity of clamping piece |
Non-Patent Citations (1)
| Title |
|---|
| 韩光等: "锚索预应力损失的影响因素分析及其补偿措施", 《辽宁工程技术大学学报（自然科学版）》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759323A (en) * | 2017-01-20 | 2017-05-31 | 中铁二院工程集团有限责任公司 | Anchor pole shock-resistant and energy-dissipating is constructed |
| CN109295974A (en) * | 2018-09-27 | 2019-02-01 | 中国人民解放军军事科学院国防工程研究院 | A kind of dynamic load modular controllable displacement prestress anchorage cable head elasticity system and method |
| CN112360528A (en) * | 2020-10-27 | 2021-02-12 | 国网经济技术研究院有限公司 | Surrounding rock anchoring supporting structure with controllable anchoring force and large deformation adaptability |
| CN114547731A (en) * | 2022-01-20 | 2022-05-27 | 中国电建集团成都勘测设计研究院有限公司 | Method for determining free length of cavity side wall anchor cable containing specific structural surface and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104727317B (en) | 2016-08-17 |
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Address after: 221116 Research Institute of China University of Mining and Technology,, Jiangsu Applicant after: CHINA University OF MINING AND TECHNOLOGY Applicant after: CHINA COAL CONSTRUCTION GROUP CO.,LTD. Address before: 221008 Research Institute, China University of Mining and Technology, Xuzhou University, Jiangsu, China, Applicant before: CHINA University OF MINING AND TECHNOLOGY Applicant before: CHINA COAL CONSTRUCTION GROUP CO.,LTD. |
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Granted publication date: 20160817 |